Just for (perhaps) general interest....
Modern diesels have a pump that pressurises diesel up to astronomic levels, and this fuel is pumped into a tube called the common rail. Each cylinder has a pipe leading from the common rail to its injector. Whereas in the past, the injector would automatically open when subjected to a certain pressure, modern ones are opened by an electronic solenoid - the time and duration being governed by the car's ECU.
Combined with this system, a turbo charger pressurises incoming air to the cylinders to achieve maximised combustion, and the air is cooled first by an intercooler. The turbo is also ECU controlled to give optimum boost - this also reduces emissions.
Unfortunately the diesel is a complete enemy at the moment due to its particulate emissions.....to a degree they are cleaned even more courtesy of a diesel particulate filter but even this doesn't satisfy the politicians, and to satisfy Euro 6 requirements I'd doubt if even Adblue additive is enough - so the days of the diesel have to be numbered I'm sad to say.
With so much demand on the diesel unit and particularly the turbo, quality oil and regular changes are even more vital than ever.
John
